<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <link rel="stylesheet" href="../bootstrap.min.css">
  <style>
    .red {
      color: red;
    }
  </style>
</head>

<body>
  <div id="app">
    <div class="container">
      <!-- 顶部搜索框模块 -->
      <div class="form-group">
        <div class="input-group">
          <h4>品牌管理</h4>
        </div>
      </div>

      <!-- 数据表格 -->
      <table class="table table-bordered table-hover mt-2">
        <thead>
          <tr>
            <th>编号</th>
            <th>资产名称</th>
            <th>价格</th>
            <th>创建时间</th>
            <th>操作</th>
          </tr>
        </thead>
        <tbody v-show="list.length>0">
          <tr v-for="(v,i) of list">
            <td>{{ v.id }}</td>
            <td>{{ v.name }}</td>

            <!-- 如果价格超过100，就有red这个类 -->
            <td :class="{red:v.price>100}">{{ v.price }}</td>
            <td>{{ v.time }}</td>
            <td><a href="#" @click="del(v.id)">删除</a></td>
          </tr>
          <tr style="background-color: #EEE">
              <td>统计:</td>
              <td colspan="2">总价钱为: {{ totalPrice }}</td>
              <td colspan="2">平均价: {{ (totalPrice/list.length).toFixed(2)}}</td>
        </tr>
        </tbody>
        <tfoot>
          <tr>
            <td colspan="5" style="text-align: center">暂无数据</td>
          </tr>
        </tfoot>
      </table>

      <!-- 添加资产 -->
      <form class="form-inline">
        <div class="form-group">
          <div class="input-group">
            <input v-model="name" type="text" class="form-control" placeholder="资产名称" />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <div class="form-group">
          <div class="input-group">
            <input v-model="price" type="text" class="form-control" placeholder="价格" />
          </div>
        </div>
        &nbsp;&nbsp;&nbsp;&nbsp;
        <!-- 阻止表单提交 -->
        <button class="btn btn-primary" @click="add" @sumbit.prevent>添加资产</button>
      </form>
    </div>
  </div>
  <script src="../vue.js"></script>
  <script>
    const app = new Vue({
      el: '#app',
      data: {
        list:JSON.parse(localStorage.getItem('list'))||[],
        name: "", // 名称
        price: "", // 价格        
        // list: [
        //   { id: 100, name: "外套", price: 199, time: new Date('2010-08-12').toLocaleDateString() },
        //   { id: 101, name: "裤子", price: 34, time: new Date('2013-09-01').toLocaleDateString() },
        //   { id: 102, name: "鞋", price: 25.4, time: new Date('2018-11-22').toLocaleDateString() },
        //   { id: 103, name: "头发", price: 19900, time: new Date('2020-12-12').toLocaleDateString() }

        // ],
      },
      computed:{
     totalPrice(){
     return this.list.reduce((sum,v)=>sum+v.price,0)
     }
      },
      watch:{
     list:{
      deep:true,
      handler(){
        localStorage.setItem('list',JSON.stringify(this.list))
      }
     }
      },
      methods:{
        del(id){
          return this.list=this.list.filter(v=>v.id!==id)
        },
        add(){
          if(this.name===''||this.price==='') 
          return alert('用户数据不能为空')
          this.list.push({
            id:Math.max(0,...this.list.map(v=>v.id))+1,
            name:this.name,
            price:this.price,
            time:new Date().toLocaleDateString()
          })
          this.name=''
          this.price=''
        }
        
      }
      
    })
  </script>


</body>

</html>